Some fighters compensate for their lack of natural ability with grit, strategy, an iron chin or sheer determination. For the distinction of the belt holder with the least talent (I may be wrong) I'd nominate; IBF Lightweight, WBO and NABF Light Welterweight title holder Greg Haugen may he rest in peace. Who you got?
It depends... Are we talking about champions with at least a couple of defences, or will guys who get gifted into a soft belt and lose it first time out included?